Multistage countercurrent recrystallization process and apparatu

Details Multistage countercurrent recrystallization process and apparatu Multistage countercurrent recrystallization process and apparatu

1993-05-25

1996-04-09

Straub, Gary P.

Chemical apparatus and process disinfecting, deodorizing, preser

Physical type apparatus

Crystallizer

4222451, 23295R, 23296, 23305R, C01D 316, B01D 900

Patent

active

055059244

ABSTRACT:
A multistage process for the separation and purification of a desired crystalline material by repeated dissolution and recrystallization, wherein crystals and solvent move countercurrent to one another through the stages. A fluid temperature gradient is maintained within each recrystallization unit to make use of convection to facilitate or accelerate concurrent dissolution and recrystallization within a single vessel. Solid recrystallized material is moved from one unit to the next unit. An automated apparatus and a manually operated apparatus for carrying out the process are also described.

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patent: 5127921 (1992-07-01), Griffiths

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